Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 20:22:09 +00:00
Code Issues Packages Projects Releases Wiki Activity
ac1d62c948
linux/drivers/clk/mmp/clk-of-pxa168.c
Doug Brown ac1d62c948 clk: mmp: pxa168: add new clocks for peripherals 
This commit adds three new clocks that previously didn't exist, but are
needed in order to match the clock parenting as described in the PXA168
datasheet.

Signed-off-by: Doug Brown <doug@schmorgal.com>
Link: https://lore.kernel.org/r/20220612192937.162952-5-doug@schmorgal.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-09-30 13:34:06 -07:00

305 lines
12 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* pxa168 clock framework source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/of_address.h>
#include <dt-bindings/clock/marvell,pxa168.h>
#include "clk.h"
#include "reset.h"
#define APBC_UART0 0x0
#define APBC_UART1 0x4
#define APBC_GPIO 0x8
#define APBC_PWM0 0xc
#define APBC_PWM1 0x10
#define APBC_PWM2 0x14
#define APBC_PWM3 0x18
#define APBC_RTC 0x28
#define APBC_TWSI0 0x2c
#define APBC_KPC 0x30
#define APBC_TIMER 0x34
#define APBC_AIB 0x3c
#define APBC_SW_JTAG 0x40
#define APBC_ONEWIRE 0x48
#define APBC_TWSI1 0x6c
#define APBC_UART2 0x70
#define APBC_AC97 0x84
#define APBC_SSP0 0x81c
#define APBC_SSP1 0x820
#define APBC_SSP2 0x84c
#define APBC_SSP3 0x858
#define APBC_SSP4 0x85c
#define APMU_DISP0 0x4c
#define APMU_CCIC0 0x50
#define APMU_SDH0 0x54
#define APMU_SDH1 0x58
#define APMU_USB 0x5c
#define APMU_DFC 0x60
#define APMU_DMA 0x64
#define APMU_BUS 0x6c
#define APMU_GC 0xcc
#define APMU_SMC 0xd4
#define APMU_XD 0xdc
#define APMU_SDH2 0xe0
#define APMU_SDH3 0xe4
#define APMU_CF 0xf0
#define APMU_MSP 0xf4
#define APMU_CMU 0xf8
#define APMU_FE 0xfc
#define APMU_PCIE 0x100
#define APMU_EPD 0x104
#define MPMU_UART_PLL 0x14
struct pxa168_clk_unit {
struct mmp_clk_unit unit;
void __iomem *mpmu_base;
void __iomem *apmu_base;
void __iomem *apbc_base;
};
static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {
{PXA168_CLK_CLK32, "clk32", NULL, 0, 32768},
{PXA168_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000},
{PXA168_CLK_PLL1, "pll1", NULL, 0, 624000000},
{PXA168_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000},
};
static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {
{PXA168_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},
{PXA168_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},
{PXA168_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},
{PXA168_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},
{PXA168_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0},
{PXA168_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},
{PXA168_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0},
{PXA168_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0},
{PXA168_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0},
{PXA168_CLK_PLL1_192, "pll1_192", "pll1_96", 1, 2, 0},
{PXA168_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0},
{PXA168_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 1, 5, 0},
{PXA168_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 1, 5, 0},
{PXA168_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0},
{PXA168_CLK_PLL1_2_1_10, "pll1_2_1_10", "pll1_2", 1, 10, 0},
{PXA168_CLK_PLL1_2_3_16, "pll1_2_3_16", "pll1_2", 3, 16, 0},
{PXA168_CLK_CLK32_2, "clk32_2", "clk32", 1, 2, 0},
};
static struct mmp_clk_factor_masks uart_factor_masks = {
.factor = 2,
.num_mask = 0x1fff,
.den_mask = 0x1fff,
.num_shift = 16,
.den_shift = 0,
};
static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
{.num = 8125, .den = 1536}, /*14.745MHZ */
};
static void pxa168_pll_init(struct pxa168_clk_unit *pxa_unit)
{
struct clk *clk;
struct mmp_clk_unit *unit = &pxa_unit->unit;
mmp_register_fixed_rate_clks(unit, fixed_rate_clks,
ARRAY_SIZE(fixed_rate_clks));
mmp_register_fixed_factor_clks(unit, fixed_factor_clks,
ARRAY_SIZE(fixed_factor_clks));
clk = mmp_clk_register_factor("uart_pll", "pll1_4",
CLK_SET_RATE_PARENT,
pxa_unit->mpmu_base + MPMU_UART_PLL,
&uart_factor_masks, uart_factor_tbl,
ARRAY_SIZE(uart_factor_tbl), NULL);
mmp_clk_add(unit, PXA168_CLK_UART_PLL, clk);
}
static DEFINE_SPINLOCK(uart0_lock);
static DEFINE_SPINLOCK(uart1_lock);
static DEFINE_SPINLOCK(uart2_lock);
static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"};
static DEFINE_SPINLOCK(ssp0_lock);
static DEFINE_SPINLOCK(ssp1_lock);
static DEFINE_SPINLOCK(ssp2_lock);
static DEFINE_SPINLOCK(ssp3_lock);
static DEFINE_SPINLOCK(ssp4_lock);
static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};
static DEFINE_SPINLOCK(timer_lock);
static const char *timer_parent_names[] = {"pll1_48", "clk32", "pll1_96", "pll1_192"};
static DEFINE_SPINLOCK(reset_lock);
static struct mmp_param_mux_clk apbc_mux_clks[] = {
{0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},
{0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},
{0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART2, 4, 3, 0, &uart2_lock},
{0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},
{0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},
{0, "ssp2_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP2, 4, 3, 0, &ssp2_lock},
{0, "ssp3_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP3, 4, 3, 0, &ssp3_lock},
{0, "ssp4_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP4, 4, 3, 0, &ssp4_lock},
{0, "timer_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER, 4, 3, 0, &timer_lock},
};
static struct mmp_param_gate_clk apbc_gate_clks[] = {
{PXA168_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA168_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA168_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA168_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
{PXA168_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
{PXA168_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA168_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA168_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA168_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock},
/* The gate clocks has mux parent. */
{PXA168_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock},
{PXA168_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock},
{PXA168_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBC_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock},
{PXA168_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock},
{PXA168_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock},
{PXA168_CLK_SSP2, "ssp2_clk", "ssp2_mux", CLK_SET_RATE_PARENT, APBC_SSP2, 0x3, 0x3, 0x0, 0, &ssp2_lock},
{PXA168_CLK_SSP3, "ssp3_clk", "ssp3_mux", CLK_SET_RATE_PARENT, APBC_SSP3, 0x3, 0x3, 0x0, 0, &ssp3_lock},
{PXA168_CLK_SSP4, "ssp4_clk", "ssp4_mux", CLK_SET_RATE_PARENT, APBC_SSP4, 0x3, 0x3, 0x0, 0, &ssp4_lock},
{PXA168_CLK_TIMER, "timer_clk", "timer_mux", CLK_SET_RATE_PARENT, APBC_TIMER, 0x3, 0x3, 0x0, 0, &timer_lock},
};
static void pxa168_apb_periph_clk_init(struct pxa168_clk_unit *pxa_unit)
{
struct mmp_clk_unit *unit = &pxa_unit->unit;
mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base,
ARRAY_SIZE(apbc_mux_clks));
mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,
ARRAY_SIZE(apbc_gate_clks));
}
static DEFINE_SPINLOCK(sdh0_lock);
static DEFINE_SPINLOCK(sdh1_lock);
static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"};
static DEFINE_SPINLOCK(usb_lock);
static DEFINE_SPINLOCK(disp0_lock);
static const char *disp_parent_names[] = {"pll1_2", "pll1_12"};
static DEFINE_SPINLOCK(ccic0_lock);
static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"};
static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"};
static struct mmp_param_mux_clk apmu_mux_clks[] = {
{0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock},
{0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock},
{0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock},
{0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock},
{0, "ccic0_phy_mux", ccic_phy_parent_names, ARRAY_SIZE(ccic_phy_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 7, 1, 0, &ccic0_lock},
};
static struct mmp_param_div_clk apmu_div_clks[] = {
{0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},
};
static struct mmp_param_gate_clk apmu_gate_clks[] = {
{PXA168_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL},
{PXA168_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},
{PXA168_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock},
/* The gate clocks has mux parent. */
{PXA168_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock},
{PXA168_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock},
{PXA168_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock},
{PXA168_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},
{PXA168_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},
{PXA168_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},
};
static void pxa168_axi_periph_clk_init(struct pxa168_clk_unit *pxa_unit)
{
struct mmp_clk_unit *unit = &pxa_unit->unit;
mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,
ARRAY_SIZE(apmu_mux_clks));
mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,
ARRAY_SIZE(apmu_div_clks));
mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,
ARRAY_SIZE(apmu_gate_clks));
}
static void pxa168_clk_reset_init(struct device_node *np,
struct pxa168_clk_unit *pxa_unit)
{
struct mmp_clk_reset_cell *cells;
int i, nr_resets;
nr_resets = ARRAY_SIZE(apbc_gate_clks);
cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);
if (!cells)
return;
for (i = 0; i < nr_resets; i++) {
cells[i].clk_id = apbc_gate_clks[i].id;
cells[i].reg = pxa_unit->apbc_base + apbc_gate_clks[i].offset;
cells[i].flags = 0;
cells[i].lock = apbc_gate_clks[i].lock;
cells[i].bits = 0x4;
}
mmp_clk_reset_register(np, cells, nr_resets);
}
static void __init pxa168_clk_init(struct device_node *np)
{
struct pxa168_clk_unit *pxa_unit;
pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
if (!pxa_unit)
return;
pxa_unit->mpmu_base = of_iomap(np, 0);
if (!pxa_unit->mpmu_base) {
pr_err("failed to map mpmu registers\n");
return;
}
pxa_unit->apmu_base = of_iomap(np, 1);
if (!pxa_unit->apmu_base) {
pr_err("failed to map apmu registers\n");
return;
}
pxa_unit->apbc_base = of_iomap(np, 2);
if (!pxa_unit->apbc_base) {
pr_err("failed to map apbc registers\n");
return;
}
mmp_clk_init(np, &pxa_unit->unit, PXA168_NR_CLKS);
pxa168_pll_init(pxa_unit);
pxa168_apb_periph_clk_init(pxa_unit);
pxa168_axi_periph_clk_init(pxa_unit);
pxa168_clk_reset_init(np, pxa_unit);
}
CLK_OF_DECLARE(pxa168_clk, "marvell,pxa168-clock", pxa168_clk_init);
Reference in New Issue View Git Blame Copy Permalink